An Organometallic Approach to Gold Nanoparticles: Synthesis and X‐Ray Structure of CO‐Protected Au₂₁Fe₁₀, Au₂₂Fe₁₂, Au₂₈Fe₁₄, and Au₃₄Fe₁₄ Clusters

Abstract

CO-vering gold: An organometallic approach to the synthesis of CO-protected Au–Fe nanoparticles led to solutions of colloids with hydrodynamic diameters between 4 and 300 nm, from which [Au21{Fe(CO)4}10]5− (picture: metal frame; Au yellow, Fe green), [Au22{Fe(CO)4}12]6−, [Au28{Fe(CO)3}4{Fe(CO)4}10]8−, and [Au34{Fe(CO)3}6{Fe(CO)4}8]8− were isolated. Their X-ray structures resemble those of gold–thiolate clusters.